Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202315985
Keywords
Complexes; Cucurbituril; Stimulus; Supramolecular; Viologen
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This article describes the structural tunability of cucurbit[8]uril (CB[8]) host/guest complexes and their responsiveness to various stimuli in water. A series of versatile 3:2 host/guest complexes were prepared by combining CB[8] with symmetric, linear diviologens, exhibiting remarkable dynamic properties and external ring translocation.
Now that the chemistry of 1 : 1 host:guest complexes is well-established, it is surprising to note that higher stoichiometry (oligomeric) complexes, especially those with excess host, remain largely unexplored. Yet, proteins tend to oligomerize, affording new functions for cell machinery. Here, we show that cucurbit[n]uril (CB[n]) macrocycles combined with symmetric, linear di-viologens form unusual 3 : 2 host:guest complexes exhibiting remarkable dynamic properties, host self-sorting, and external ring-translocation. These results highlight the structural tunability of cucurbit[8]uril (CB[8]) based 3 : 2 host:guest complexes in water and their responsiveness toward several stimuli (chemicals, pH, redox). A family of versatile 3 : 2 host/guest complexes has been prepared by combining cucurbit[n]urils with symmetric, linear diviologens. These assemblies have properties typical of 1 : 1 complexes, but also show a new type of supramolecular translational-rotational coupling, peripheral complexation amenable to proximal or distal binding, and controllable peripheral ring translocation.image
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